Why Fiji?

Marlon: Where the hell’s Fiji? Near Florida?
Truman: [pointing to golf ball] See here?
Marlon: Yeah.
Truman: This is us…
[guides finger halfway around ball]
Truman: and all the way around here… FIJI. You can’t get any further away before you start coming back.

Truman: Can you tell her I had to go to Fiji and that I’ll call her when I get there?