illegal instruction (core dumped) occurs when installing open3d

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

Hi, I'm trying to use open3d in Ubuntu18.04 on virtualbox (on windows11).
I installed open3d with pip and check it with `python3 -c "import open3d as o3d; print(o3d.__version__)"`, then I got the message saying `illegal instruction`. How can i fix it?

On my ubuntu, python is `version2.7`, so i used python3 which is `version3.6.9` instead.

Thanks in advance,
Karin