[Phil153]

I'd bet the flop and fold a non low turn.

Flop bet is a no brainer, it's nearly 50/50 that no one has a 6 and it's worth trying to pick up the 7BB pot.

Once you're bet into on the turn, you either have to call to the river or fold. Calling to the river ensures you pay off 2BB every time someone has a 6, which I think is quite likely for someone that would call the flop and then bet into you on the turn. You're risking 2BB to win 5.5BB, so he'd need to not have a 6 ~30% of the time (including suckouts). I don't like it.

Of course if the turn is a low then you have an easy call.