Did I play this KK wrong on the flop? (basic low limit question)

[Barrett's Last Privateer]

Folks,

Hoping to get some opinions on a situation I came across last night in a low limit SNG.

First level(blinds 5/10), I was 3 off the button with KsKd. Four calls to me, I put in a pot size raise (75), both blinds folded but three others called.

The flop came 6h 9c Th, the guy who was first to act bet the pot (335), and I folded.

This might be a really basic situation with an obvious correct play, but I sometimes wonder if I'm too hasty to give up an overpair or say AK if I don't get any part of the flop and someone to act before me bets.

Should I have played this differently? What about if the bet had have been smaller?

Any advice greatly appreciated.

Cheers.