Insert your 3D-item using Insert - 3D models - From a file/From online sources - select the category e.g. Toys - and finally select the 3D-model you need and click Insert. If you do not have Office 365 your choices may be limited.
You can recognise it is a 3D model by the button that is right in the middle of the model. You can use it to change the orientation of the object.
Now right-click the model and choose Save as picture from the quick menu. Choose your folder, type a suitable name and click Save.
After the save you will have a picture: