Bet 3/4 pot. If everyone folds, you just take the money and use it to pay your blinds. If somebody calls, i would bet the turn harder. You don't want somebody that has a pair in their hand to get a boat. If they reraise, go all-in. It's a freeroll and you have the best hand anyway. You will get their money, a player out, respect and a large stack. OR if you lose, you saved yourself 2+ hours.