I say Massa-choo-zits and apparently this is fairly unusual. The friend (a linguist) who first pointed out, years ago, that I said it this way theorizes that it may be a Western Mass thing, which I think might have some merit to it considering that it's the pronunciation provided in
this video and that my speech does have some other Western Mass shibboleths such as "tag sale" instead of "yard/garage sale" and the General American "water fountain" instead of the Eastern Mass "bubbler". I'm curious if there are people from elsewhere who also say it this way.
I also say houzes, Jozeph, and Jeruzalem.