This sound effect can be found on The Premiere Edition Volume 9, which was made by The Hollywood Edge. It includes a low pitched version of ELEPHANT - VARIOUS SNORTS, GROWLS, TRUMPETS, ANIMAL (such as Elephant Sorrowful W PE931117).
It’s almost identical to Dinosaur Roar Moan Ti PE980503.
Sound Effect Description[]
Dinosaur Moan, Growl Lower, Painful