Your experiments with positions and rotations of the camera and the scene are hell of the chaos.
Anyway, somehow I dug through it
You can use THREE.Box3()
and its method to put your model in the center of the scene.
https://jsfiddle.net/prisoner849/dwqqqg9d/
The red box shows the the original position of your model.
loader.load('https://security-press.com/fbx/model/DigestiveAnimation.fbx', function(object) {
var box3 = new THREE.Box3().setFromObject(object);
scene.add(new THREE.Box3Helper(box3, 0xFF0000));
var shift = box3.getCenter();
object.position.sub(shift);
scene.add(new THREE.Box3Helper(new THREE.Box3().setFromObject(object)));
scene.add(object);
}, onProgress, onError);