Call of duty performance on 13 inch MacBook pro?

Hi I will be getting a MacBook pro soon and I want the 13 inch. I will want to play games like call of duty 4, modern warfare, and black ops. If I played those games on this computer (with boot camp) how many frames per second would I get? are they playable? Also, what tips do you have to make the game run faster (graphic settings.) Also, don't tell me to get some gaming pc or larger Mac, I know I want the 13 inch MacBook pro.