@og22 Thanks for reaching out!
It does not look like the MSR Pocket Rocket Deluxe stove will fit in the 750 ml pot with a small fuel canister. Please take a look at this conversation, Looking for small stove recommendations, for a lot of really good information from members of our community.
I think it will ...check out this video starting at about 6:00 min. I haven't watched the rest or listened to it so I make no other representation about the video but the guy definitely puts a 100g canister and the PR deluxe in that 750ml Toaks pot
It's the original PR that is too big.
I can fit my Soto Amicus and a 100g canister in a Toaks 650 pot along with a few other dodads. In its bag with the cap on the canister it pushes on the lid but the lid just rests on anyway. You have to band it or bag it.