Just call the USF Office of Greek Life to find out when chapter meetings are held. All of the sororities will hold their chapter meetings on the same day at around the same time each week. Go from there.
You will get cut from a few chapters at USF in the early rounds at recruitment on the basis on your year in school. But since you are coming in with good grades and activities, you should have a reasonable chance at getting a sorority bid by keeping your options open and giving all of the chapters who invite you back a fair chance.
By the way, your football team sucks.

It's not too late to join us on the other side of I-4.