Ah, I didn't realise it was a DNA... I set my DNA60 to 2.8v.
I don't think 2.75 is 'default' for Evolve, but I expect the mod manufacturer, who put their own setting on as default, likely thought it would make it seem like the mod has great battery life out of the box, there's a lot of vaping that can be done between 3.something volts and 2.8v. That cut off number is also under load when firing, so with 'sag' the battery won't actually be that low when you put it on charge, mine usually bounce back 0.2v or so in just a minute or two. If you are vaping at higher power the difference will be even more than that.