I had my Regal in a 50 gallon while acclimating to aquarium life and he was fine and have now moved him to my 120g, so yes I think you would be ok with a 75g.
eho72
You can try Arcti Pods by Reef Nutrition, I have had alot of luck with finnicky eaters with this.
Good Luck

Really? I thought arti pods were for corals?