Assuming he bets the pot, you have a 33% chance of winning so you could bet up to.5 the (bet + pot) which in this case is up to a pot size bet. In this case you call as you also have implied odds. (i.e. You know your opponent will continue to make/call large bets if you hit your hand.)

At those stakes, you just want to ge the odds to chase and punish him when you hit. So call, if your card hits you are golden. If it doesn't, see if he gives you odds again.

With that flop your hand is completely hidden. Ideally you'd like to have at least a backdoor flush to help your odds out as well.

You played your SC fine.

Good luck