QQ's pre flop decision.

2/3 NL. This is early in the session. I have 300 and I'm the effective stack.

CO...White late 30's. Has been very aggressive pre with raises. He has cold called a bunch. He seems like he knows what he is doing.

Button...Young black guy just sat down.

I should have a tight image over a small sample size.

HJ opens to 15, CO raises to 35, I am in the SB with QQ's. What is my play here?

Would my play be different if I had a 500 stack?