10 handed blinds 600/1200 with ante 120 in the $82 100k gtd

My chip stack in the Small blind 59,862. CO chip stack 47,043. Big blind 26,665.

Im in the small blind with JxJx, cutoff opens for 2400 folds to me I call Big Blind calls. CO was fairly solid.

Flop: 7cQd10c I check, big blind checks, CO bets 3925

I call 3925, Big blind folds

T: 7d I check, CO bets 8974

Is AxKx or 10x10x bluffing here often? Can we check raise?