How much should my credit score raise since I paid off a collection account?

There were small medical bills that slipped through the cracks from a surgery I had, which collectively amounted to 500$. Upon running my credit score to obtain a line of credit, I found it and paid them in full with cash immediately (this was the 19th of last month.) My score is currently at 664, how much can I expect it to raise after paying this off? I am 25 years old with only 2 years of credit history..