Blinds 75-150. 4 full tables left.
You have QQ in the BB.
Early position player limps in.
The CO (who is a tight solid player) makes it 650.
Your stack is 5200, the CO just covers you.
Button and SB fold.
What do you do ?
(the limper was a weak player who had limped a lot but always folded to a raise, so you're not worried about him; the CO would be aware of this also).


PS - starting chips was 6000.