Would take a bit of luck, but.. I'd do a dual (online/offline) strategy. $750 is not alot of money.
First, I'd imagine I'd die if I do not complete this task. If my mind aint right, the hustle wont be.
Second, I'd throw 30 of that 250 in the gas tank and do Uber Eats and Door Dash Simultaneously. Where I live, you can get $200 in about five hours if you can juggle both and cherrypick your orders. 12pm-10pm I should have about $400.
12AM-12PM,(and waiting periods while driving) I'd research a bunch of trending products online that I could sell online (dropshipping) for $100. Build a shopify store (free) an IG page with bought followers(cheap, but temporary) and jacked pics, and DM influencers with 10k+ followers my carefully created ads for posting on their page and link them to my website.
I'd also DM TONS of people who I'd feel would love my product and hit em all up with sales pitches.
Since I'd have $400 from food delivery, I'd only need to convince 4 out of many of people online to buy my $100 dollar product with the money spent on advertising and my sales pitches.
Since I'm pretty good at copywriting, I feel I could pull it off.