I have a Montana 3725RL. If I recall your 3750FL comes in with a dry weight about 200 or 300 pounds lighter than my model, however your pin weight could be the same or slightly higher don't know for sure.
Shipping weights, or dry weights don't really mean much. By the time I picked mine up with 2nd air, Travler Dish, washer/dryer, G614 tires added I am sure it weighed another 300 pounds without our stuff.
I weigh mine every 6 or 8 months. I can tell you that I am right at my limit but not over. My pin is 23.6%.
You are going to get a ton of very strong opinions reference SRW vs DRW. You can see from my signature what I pull mine with.
If you actually want to get good advise on pulling your exact model then sign up with the MOC (Montana's Owners Forum) There are numerous ones on that site with the 3750 front living and many of them are full timers.
Good luck with your research and decision.