I don"t think you should call, Suzanne. As played, he has c/c the flop and c/r the turn. Remember it was a 5-way flop, so more likely your monster pair will be outdrawn. And he was happy to go to the flop 5-way oop, so it"s hard to put him on that over-pair that you are beating. If you call, he will have caused himself to go to the river oop in a huge pot. It doesn"t look good for you.
I think there is more to this hand than that, though. What would you want him to do when you make those bets of 550 and, say, 1200 - call or fold? Second to act out of five with one big pair on a nothing flop that has hardly any draws, you are either way ahead or way behind and likely to stay whichever way it is. There are a few ways that someone could overtake you on the turn or river, but not many. This isn"t the time for big bets. Betting half the pot or less on the flop might keep weaker hands in, and cost you less if you are behind. On the turn, we then have the same scenario, but with a less-inflated pot, so if we bet or call, it will be for a smaller amount. A 1200 bet here would be too big imo (as played on the flop). Your 750 is much better (possibly with a check behind on the river), or you could check behind on the turn and value-bet the river or call if he bets it. If you are winning I can"t see you getting 3 streets of value here.