I lived on that much when I was a graduate student. That was almost 15 years ago, so things are a bit more expensive now. I was paying about 35-45% of my income in rent, but it was inclusive, so I didn’t have utilities on top of that. The parental unit covered car insurance, and the school covered health insurance, so I was pretty much set with $500-600/month to cover all of my additional expenses. I even managed to save some money most months, but probably because I’m not terribly impulsive with money, and am pretty boring. The biggest single luxury expense after eating out was probably skiing.
You can do it, but as others have said, it is the unexpected expenses which will kill you. For that some savings is indispensable. A $500 car repair sucks, but having some savings means you can cover the repair and still pay the rent. The real secret is to be good with money. By that I mean, know how much you have for different categories, and don’t spend more than that.
Set out the fixed expenses you know such as phone and car insurance. Add to that the fixed expenses you can estimate such as gas and groceries. Make sure to use realistic estimates. For example, overestimate the price of gas and underestimate your cars mileage. The price of food adds up very quickly if your buying prepackaged and prepared food. Can you cook? Starting from basic ingredients can save you huge amounts of money. The raw ingredients for a lasagna (6 meals perhaps?) are going to be less than the cost of a frozen lasagna, and probably taste much better. The $5 difference in price of the lasagnas might not seem like much, but multiply that by 20 meals a week.
Once you have all your expenses set out, then you can figure out how much you can afford for rent + utilities (electricity, internet, gas, etc.). Is that a reasonable amount? Can you live someplace with roommates for that much?
This also means giving up lots of little expenses. A Starbucks a day can add up to $100/month. Is that a habit you have? Can you realistically give it up? A movie out a week might be $50 a month.
Like I said, I’ve always been well disciplined with money, so it was easy for me to use a credit card and pay it off every month, and that gave me a great snapshot of where I was spending money, and when things got too tight an excellent idea of where I needed to cut down. Do you have old credit card statements so you can see how much you spend in a month?
I think you can do it if you can find the right living situation, and you can be disciplined enough to genuinely live within your means.